Frost. Condensation.
Find the source.

Attic frost and thawing can involve indoor air leaks, exhaust faults and ventilation. Start with the conditions, then plan the correction.

HOW THE PATTERN CAN DEVELOP

Follow the moisture.

Moist air gets in.

Warm indoor air can escape through ceiling leaks or disconnected bathroom exhaust ducts and enter the colder attic.

Cold surfaces collect it.

Moisture can condense or freeze on cold roof sheathing, fasteners or other surfaces. The pattern can become more noticeable in winter.

Frost starts to thaw.

When temperatures rise, the accumulated frost can melt and drip. This is sometimes called attic rain and can be mistaken for a roof leak.

Insulated exhaust duct connected to a roof outlet — Bathroom exhaust connections are one of the details considered in a moisture assessment.

Correct the pathway.

Tell us when the moisture appears, the weather conditions and whether a fan or room below seems related. Photos and a record of when the dripping occurs can help distinguish the pattern.

The plan may include sealing accessible ceiling leaks, reconnecting and insulating exhaust ducts, clearing intended eave intake and reviewing roof exhaust. Existing roof leaks and other sources also need to be considered.

Staining or suspected mould may need a separate specialist assessment. Covering damp or affected material with new insulation does not resolve the underlying source.

Explore the full system ↗

YOUR HOME. YOUR NEXT STEP.

Let’s make a plan
for your attic.

Tell us the address and what you’re noticing. We’ll discuss the attic assessment and a written scope for the work.

Request a quote

Frost. Condensation.Find the source.